Owing to the features of fluidized burning and desulphurization inside the furnace

the particle concentration is very high in CFB boilers

and the composition of fly ash particles in the furnace is different from that in pulverized coal boilers

it is easily to result in abrasion of reheater tubes

and further leading to tube-burst.Hence

it is specially important to pay attention for preventing fly ash particles from entering into reheater tubes after tube-burst

to result in ash clogging.During the time of judging the occurrence of reheater leakage

the operation of fluidizing fan should be controlled

reducing the particle concentration in upper part of furnace.At the same time

the vacuum can be timely reduced

decreasing the possibility of extracting particles into the reheater tubes.